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To cite KernSmoothIRT in publications use:

Mazza A, Punzo A, McGuire B (2014). “KernSmoothIRT: An R Package for Kernel Smoothing in Item Response Theory.” Journal of Statistical Software, 58(6), 1–34. http://www.jstatsoft.org/v58/i06/.

Corresponding BibTeX entry: 

  @Article{,
    title = {{KernSmoothIRT}: An {R} Package for Kernel Smoothing in
      Item Response Theory},
    author = {Angelo Mazza and Antonio Punzo and Brian McGuire},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {58},
    number = {6},
    pages = {1--34},
    url = {http://www.jstatsoft.org/v58/i06/},
  }

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.